The DHS inspector general released an unclassified summary of a report on Northwest Flight 327 on June 29, 2004, which aroused extensive suspicion due to the suspicious onboard activities of 14 men during the flight.
The summary says cryptically little:
The Departmentâ€™s internal system for communicating and coordinating information on suspicious passengers, activities, and incidents in the gate area and aboard aircraft needs improvement. In addition, both the Federal Air Marshal Service and the Federal Bureau of Investigation have statutory authority to investigate in-flight incidents, thereby causing possible confusion, duplication, and the potential for compromising investigative cases.
We made recommendations to improve the FAMSâ€™ ability to communicate and the Departmentâ€™s coordination and information sharing.
What’s left unstated is whether the investigators believed that this incident was connected to terrorist planning, or whether the events on the flight were simply a series of odd coincidences.
Update (4/26): A related story from the Washington Times.